//有较大I/O问题的程序
#include<stdio.h>
void display(char cr,int lines,int width);
int main(void)
{
    int ch;  //待打印字符
    int rows,coals;
    printf("Enter a character and two integers:\n");
    while((ch=getchar())!='\n')
    {
        scanf("%d %d",&rows,&coals);
        display(ch,rows,coals);
        printf("Enter another character and two integers;\n");
        printf("Enter a newline to quit.\n");
    }
    printf("Bye.\n");
    return 0;
}
void display(char cr,int lines,int width)
{
    int row,col;
    for(row=1;row<=lines;row++)
    {
        for(col=1;col<=width;col++)
        putchar(cr);
        putchar('\n');
    }
}